Display device capable of adjusting divided data in one frame
a display device and divided data technology, applied in the field of hold type display devices, can solve the problems of inability to apply emphasis drive to inability to apply emphasis in excess of the highest gray-scale field, and inability to apply emphasis drive to the lowest gray-scale field, so as to reduce the delay in pixel response speed, improve the quality of moving image, and reduce the blurring of moving imag
Active Publication Date: 2010-12-07
JAPAN DISPLAY INC +1
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Benefits of technology
The present invention provides a display device that can reduce moving image blurring and improve the quality of moving images. This is achieved by using a frame division drive and an emphasis drive that emphasizes display data in a frame period. By applying the emphasis drive to a hold-type display device, it becomes possible to realize the optical emission characteristics of an impulse type display device and obtain a good display quality with less moving image blurring. The invention also provides a method for controlling the emphasis drive separately for each frame-divided field to suppress pseudo contour lines and color shift.
Problems solved by technology
In this case, the emphasis drive cannot be applied to the highest gray-scale field, because emphasis in excess of the highest gray-scale is impossible.
In this case, the emphasis drive cannot be applied to the lowest gray-scale field, because emphasis lower than the lowest gray-scale is impossible.
As described above, it is difficult to apply the emphasis drive simply to the frame division drive.
Method used
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second embodiment
[0102]In the following, the second embodiment of the present invention will be described with reference to FIGS. 7 and 8.
[0103]FIG. 7 is a diagram showing an example of the structure of a display device according to the second embodiment of the present invention. FIG. 8 is a diagram illustrating an example of the operation of the display device according to the second embodiment of the present invention, and showing a timing chart of the display device shown in FIG. 7. In the second embodiment, the structures having identical reference numerals to those of the first embodiment are the same as those of the first embodiment. In the following, the second embodiment will be described mainly on different points from the first embodiment.
[0104]The emphasis circuit 320 receives input display data 302, and instructs the frame memory control circuit 360 to read input display data one frame before the input display data 302 from the frame memory 361 synchronously with an input of the input di...
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A speed doubling circuit receiving display data in one frame period and outputting field A display data and field B display data in one frame period. A field conversion circuit converts the field A display data to have a highest gray-scale if the display data has a high gray-scale, and converts the field B display data to have a lowest gray-scale if the display data has a low gray-scale. Between the speed doubling circuit and field conversion circuit, an emphasis circuit is disposed which emphasizes each of the field A display data and field B display data in accordance with the display data one frame period before and the display data in the present frame period.
Description
INCORPORATION BY REFERENCE[0001]The present application claims priority from Japanese applications JP 2005-137986 filed on May 11, 2005, and JP 2005-229008 filed on Aug. 8, 2005, the contents of which are hereby incorporated by reference into this application.BACKGROUND OF THE INVENTION[0002]The present invention relates to a hold-type display device such as a liquid crystal display device, an organic electro luminance (EL) display and a liquid crystal on silicon (LCOS) display and its driving method, and more particularly to a display device suitable for displaying moving images and its driving method.[0003]Display devices are mainly classified into an impulse type display device and a hold-type display device if the display devices are classified from the viewpoint of moving image display. The impulse type display device is a device like a Brown tube of the type that pixels become bright only during a scanned period and a luminance of each pixel lowers immediately after scanning, ...
Claims
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IPC IPC(8): G09G3/36
CPCG09G3/2022G09G3/3688G09G2320/0252G09G2320/0261G09G2320/0276G09G2340/16G09G3/20G09G3/30G09G3/36G02F1/133
Inventor MARUYAMA, JUNICHINITTA, HIROYUKIOOISHI, YOSHIHISAONO, KIKUO
Owner JAPAN DISPLAY INC